Ultralight ZrB2/ZrC nanofiber aerogels with excellent elasticity and ultra-low thermal conductivity

摘要

In this work, ZrB2/ZrC nanofiber aerogels with excellent elasticity and ultra-low thermal conductivity were prepared by electrospinning and freeze-drying. The aerogels with isotropic cellular-like pore structure were obtained with pore walls composed of graphene oxide attached with ZrB2/ZrC nanofibers. The aerogels showed recoverable property under 60 compressive strain. The thermal conductivity of the aerogels was 0.029 W center dot m(-1)center dot k(-1), much lower than that of other carbide and boride aerogels. These intriguing results may offer considerable advantages for thermal insulation in extreme environments.